CN201195751Y - Processing and recycling equipment for acid pickle of acid washing rolled steel - Google Patents
Processing and recycling equipment for acid pickle of acid washing rolled steel Download PDFInfo
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- CN201195751Y CN201195751Y CNU2008200884055U CN200820088405U CN201195751Y CN 201195751 Y CN201195751 Y CN 201195751Y CN U2008200884055 U CNU2008200884055 U CN U2008200884055U CN 200820088405 U CN200820088405 U CN 200820088405U CN 201195751 Y CN201195751 Y CN 201195751Y
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- acid
- storage tank
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- pickle
- acid solution
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Abstract
The utility model discloses a processing and reclaiming device of steel acid pickling acid pickle, which is characterized in that the processing and reclaiming device of acid pickle comprises a refrigerating unit, and an acid pickle pump, a filter press, an acid pickle cooling and crystallizing storage tank and a solid-liquid separation storage tank which are connected in turn, wherein the acid pickle cooling and crystallizing storage tank is connected with the refrigerating unit. The processing and reclaiming device can realize zero pollution discharge in the steel acid pickling process in deed, completely accords with the environmental protection requirements and has energy-saving and material saving effects.
Description
[technical field]
The utility model relates to a kind of processing and recovery system of acid pickle of acid washing rolled steel.
[background technology]
Tubulation after steel production or intermediate heat treatment before cold working, before steel or ferrous products are electroplated, should be disposed the iron scale of outside surface.Remove the mode of oxidation iron sheet at present, use the pickling technology basically, in the pickling production process, the acid solution that working concentration is bigger (15%～25%) is carried out cleanup acid treatment to steel.So-called spent acid solution is meant the concentration reduction of using and make acid in the pickle solution through overpickling, the content of molysite increases, thereby make the pickling ability can not satisfy the pickle solution of production rate or specification of quality, still contain about 10% acid nearly in the solution at this moment, also contain 20% or more molysite.If this spent acid solution is not handled; enter water drain; residual acid can be corroded cement and concrete and peripheral soil; and the lime carbonate balance in the destruction water body; and make animal dead in the water, be harmful to farm crop, therefore all not concentrating or regenerated spent acid sewage; before discharging, the processing of waste acid water must be carried out, otherwise the processing of country's " Law on Environmental Protection " can be subjected to.
The treatment process of spent acid is divided into both at home and abroad at present: 1. direct neutralizing treatment; 2. iron processes falls in spontaneous nucleation; 3. condensing crystal method; 4. vapo(u)r blasting vacuum crystallization method.
The direct principle of neutralizing treatment: less or lack the small-sized production line of treatment facility in the spent acid amount, with spent acid directly with in and medicament (as Wingdale breast, carbide slag) mix, by neutralization reaction, neutralization acid is wherein separated out iron ion and acid ion respectively with the form of compound.Then pH value is transferred to sedimentation, the water after the sedimentation can blowdown.Its shortcoming be in and reagent cost height, expense big, acid solution can not be recycled, and the discharging of influential surrounding material.
The principle of iron processes falls in spontaneous nucleation: online out of use waste pickle liquor is pumped in the storage tank, place cooling, at this moment some sour ferrous hydrate (being molysite) is separated out, molysite content is reduced, acid content raises, solid-state sour ferrous hydrate is separated, and the pickle solution that obtains so still can be used for pickling, and sour ferrous hydrate is as by-product utilization.Its shortcoming is that to contain the molysite amount in the acid solution higher, and the repeated use time is short, can not satisfy production very soon again, handle frequent, handle three to four times after, just can not utilize again.
The condensing crystal ratio juris: it is similar that iron processes falls in this method and spontaneous nucleation, adopts evaporation to anhydrate sour ferrous hydrate is separated out, and this method needs spent acid solution thermal dehydration under vacuum decompression, and cooling makes wherein sour ferrous separating out then.Its shortcoming is that facility investment is big, troublesome poeration, and energy consumption is big.And also there is similar shortcoming in vapo(u)r blasting vacuum crystallization method.
[summary of the invention]
Problem in view of present known technology existence, the technical problems to be solved in the utility model is to be to provide a kind of can really realize zero blowdown in the acid washing rolled steel process, complete compliance with environmental protection requirements, and tool is energy-conservation, the acid pickle of acid washing rolled steel of material-saving effect is handled and recovery method equipment.
For solving the problems of the technologies described above, the utility model takes following technical scheme to finish:
A kind of processing of acid pickle of acid washing rolled steel and recovery system, it is characterized in that: the processing of described spent acid solution comprises unit cooler and the spent acid pump that is connected successively, pressure filter, spent acid solution crystallisation by cooling storage tank, solid-liquid separation storage tank with recovery system, and spent acid solution crystallisation by cooling storage tank is connected with unit cooler.The vaporizer of described unit cooler is directly installed in the spent acid solution crystallisation by cooling storage tank.Be provided with stirrer in the described spent acid solution crystallisation by cooling storage tank.
Adopt the processing and the recovery system of the spent acid solution of technique scheme, at spent acid solution crystallisation by cooling storage tank spent acid solution is forced cooling, and (based on the following principles of chemistry: acid concentration strengthens in solution, then water content reduces, and the meltage of corresponding molysite reduces to adopt the method that adds concentrated acid in spent acid solution can effectively reduce dissolved molysite content in the acid solution; And temperature when low more the iron salt dissolved degree low more), molysite is mainly precipitated with the form of the ferrous crystal of hydrate of acid, its acid strength height of acid solution after handling like this, containing molysite amount and eo-acid liquid phase works as, can reuse, effect is the same with new acid solution, in the solid-liquid separation storage tank, carry out solid-liquid separation after, the sour ferrous hydrate that is produced (being molysite) reaches material-saving, zero release purpose as the industrial chemicals utilization.The vaporizer of unit cooler is directly installed in the spent acid solution crystallisation by cooling storage tank, makes the direct and unit cooler heat exchange of spent acid solution, has made full use of heat, has improved energy utilization rate, has remarkable energy saving effect.
[description of drawings]
The utility model has following accompanying drawing:
Fig. 1 is a structural representation of the present utility model
[embodiment]
Accompanying drawing has been represented the technical solution of the utility model and embodiment, further describes each relevant details and principle of work thereof of embodiment below more in conjunction with the accompanying drawings.
With reference to accompanying drawing 1, the processing of this acid pickle of acid washing rolled steel and recovery system, comprise unit cooler 5 and the spent acid pump 1 that is connected successively, pressure filter 2, spent acid solution crystallisation by cooling storage tank 4, solid-liquid separation storage tank 7, the vaporizer 3 of described unit cooler is directly installed in the spent acid solution crystallisation by cooling storage tank, also be provided with stirrer 8 in the described spent acid solution crystallisation by cooling storage tank, the acid solution outlet of described solid-liquid separation storage tank is connected with sour pump 6.
The processing of this acid pickle of acid washing rolled steel and recovery system are work like this, online out of use spent acid solution is pumped into pressure filter with the spent acid pump carry out press filtration, removing impurity discharges as filter cake, the spent acid solution that does not contain other impurity then enters the crystallisation by cooling storage tank, in the crystallisation by cooling storage tank, under the stirring of stirrer, the vaporizer of spent acid solution and unit cooler carries out abundant heat exchange, spent acid solution is cooled to 1～5 ℃, at this moment measure acid concentration, add concentrated acid, make acid solution contain acid concentration and reach 22%～24% according to measuring result, at this moment sour ferrous hydrate is separated out crystallization in a large number, become solid-state, acid solution contain molysite will less than 200～250g/L (with acid washing rolled steel eo-acid liquid phase when), last, acid solution and xln enter the solid-liquid separation storage tank and carry out solid-liquid separation, obtain sour ferrous hydrate, and acid solution is pumped back to pickling tank by acid, recycling, its effect is equal to new pickle solution, reaches the zero release purpose.The ferrous hydrate of acid is as the industrial chemicals utilization, and the energy consumption price that is produced in the economic benefit of its generation and the spent acid treating processes is suitable, and is very energy-conservation.
Claims (3)
1. the processing of an acid pickle of acid washing rolled steel and recovery system, it is characterized in that: the processing of described spent acid solution comprises unit cooler (5) and the spent acid pump (1) that is connected successively, pressure filter (2), spent acid solution crystallisation by cooling storage tank (4), solid-liquid separation storage tank (7) with recovery system, and spent acid solution crystallisation by cooling storage tank is connected with unit cooler.
2. the processing of a kind of acid pickle of acid washing rolled steel as claimed in claim 1 and recovery system, it is characterized in that: the vaporizer of described unit cooler (3) is directly installed in the spent acid solution crystallisation by cooling storage tank.
3. the processing of a kind of acid pickle of acid washing rolled steel as claimed in claim 1 and recovery system is characterized in that: be provided with stirrer in the described spent acid solution crystallisation by cooling storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200884055U CN201195751Y (en) | 2008-05-30 | 2008-05-30 | Processing and recycling equipment for acid pickle of acid washing rolled steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200884055U CN201195751Y (en) | 2008-05-30 | 2008-05-30 | Processing and recycling equipment for acid pickle of acid washing rolled steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201195751Y true CN201195751Y (en) | 2009-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200884055U Expired - Fee Related CN201195751Y (en) | 2008-05-30 | 2008-05-30 | Processing and recycling equipment for acid pickle of acid washing rolled steel |
Country Status (1)
| Country | Link |
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| CN (1) | CN201195751Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653437A (en) * | 2011-09-20 | 2012-09-05 | 卢玉柱 | Method for treating yellow sludge obtained in neutralization of steel pickling waste water lime |
-
2008
- 2008-05-30 CN CNU2008200884055U patent/CN201195751Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653437A (en) * | 2011-09-20 | 2012-09-05 | 卢玉柱 | Method for treating yellow sludge obtained in neutralization of steel pickling waste water lime |
| CN102653437B (en) * | 2011-09-20 | 2013-07-17 | 卢玉柱 | Method for treating yellow sludge obtained in neutralization of steel pickling waste water lime |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090218 |